Man if you insist on taking creatine, then buy 100% pure creatine monohydrate.
brand doesn't matter, but one that doesn't have claims or additives would be best.
take 5 - 10g a day and drink like 2-3L of water.
Don't expect a pump or 5kg weight gain and don't expect anything to happen in 2 weeks.
Research what creatine is, where it comes from, what it is supposed to do.
You don't need it as a supplement.
At 70kg, what you need is steak, chicken, fish, eggs, rice, pasta, greens, and compound lifts and most importantly PATIENCE - 12 months of it at least.
Don't count calories
Don't get on a scale
Don't buy supplements other than maybe a protien powder that you put 2 scoops in to a shaker, take with you to the gym, and once you've finished training, add water and drink it on your way home to a steak.
try to lift more than the last day each time.. if you get stuck on a weight for a couple of weeks, force more food in.